Answer to Question #63064 in Physics for hamid

Question

electrons are indistinguishable particles.if we have two electrons with opposite spin does this mean they are now distinguishable

Answer 1

No. They are indistinguishable particles. Because even though the particles are indistinguishable they can still be in different states, such as occupying different energy levels in an atom. Spin refers to states, not to the particles occupying them.